Question

f(x)=cosx and g(x)=3x^2 show that gof is not equal to fog​

Answer 1

Step-by-step explanation:

f(x) =cosx

g(x) = 3x^2

gof = 3(cosx)^2

and fog = cos(3x^2)

here the argument of cos are different therefore they can't be equal at any value of x. thus they are unequal.